Fuwa rear Brake Chamber Double

1. Function

• Dual Braking Function:

• Service Brake : When compressed air enters the service chamber ("11" port), it pushes the diaphragm, activating the brake through the pushrod.

• Parking Brake : When the parking chamber ("12" port) is depressurized, the stored energy spring releases, pushing the diaphragm and engaging the brake.

• Emergency Brake Safety: In case of air supply failure, the parking brake automatically engages, ensuring vehicle immobilization.

• Load-Adaptive Braking: The dual-chamber design allows independent adjustment of service and parking brake forces, adapting to different loads and driving conditions.

2. Specifications

• Chamber Configuration:

• Service Chamber : For dynamic braking during vehicle operation.

• Parking Chamber : For static braking when parked or in emergency situations.

• Ports:

• "11" Port: Service brake air inlet.

• "12" Port: Parking brake air inlet/exhaust.

• Mounting: Typically bolted to the rear axle brake assembly, with flanges or brackets for secure attachment.

3. Material

• Chamber Body: High-strength aluminum alloy or cast iron for durability and pressure resistance.

• Diaphragm: Rubber or polymer-based flexible membrane to separate air chambers and transmit force.

• Spring: High-tensile steel spring for energy storage and parking brake actuation.

• Seals: Rubber or synthetic seals to prevent air leakage and ensure long-term reliability.

4. Key Parameters

• Working Pressure:

• Service Chamber: 8–10 bar (116–145 psi).

• Parking Chamber: 8–10 bar (116–145 psi) for release, 0 bar for engagement.

• Brake Force:

• Service Brake: Typically 11,000–15,000 N (2,473–3,372 lbf) at rated pressure.

• Parking Brake: 10,000–14,000 N (2,248–3,147 lbf) via spring force.

• Pushrod Stroke: 40–65 mm (1.57–2.56 in), depending on model.

• Temperature Range: -40°C to +80°C (-40°F to +176°F), ensuring operation in extreme climates.

• Cycle Life: ≥1,000,000 cycles (service brake), with spring fatigue resistance tested for long-term use.

• Weight: Approximately 8–12 kg (17.6–26.5 lbs), varying by size and configuration.

5. Additional Features

• Corrosion Resistance: Coated body and stainless-steel fasteners for extended lifespan in harsh environments.

• Modular Design: Allows easy replacement of individual components (e.g., diaphragm, spring) without full chamber replacement.

• Compliance: Meets international standards such as SAE J1402, ECE R13, and FMVSS 121 for brake system safety.